74hc4051d is a multiplexer in integrated circuit, the pin functions are as follows: Pin 1 is the enable end, the input high voltage multiplexer can only start to work; Pins 2-4 and 10-12 are input terminals, input the signal to be selected; Pins 5 and 9 are output terminals; Pins 6, 7, and 8 are channel selection terminals, and the output is connected to the selected input channel; Pins 13, 14, and 15 are the power supply and ground terminals.
The function of these pins can realize the transmission of multiple signals through a channel, thereby reducing the number of lines and clutter in the system, improving the reliability and stability of the system.
At the same time, the multiplexer also enables fast switching between different channels.
74hc4051d is an 8-way analog switching circuit. The circuit adopts a double-row 16-pin package, in which 8 pins are GND, 16 pins are Vcc, 7 pins are Ⅴee, 6 pins are forbidden control terminals, 11, 10, 9 pins are selected wires, 13, 14, 15, 12, 1, 5, 2, 4 pins are incoming\/outgoing terminals Y0, Y1, Y2, Y3, Y4, Y5, Y6 and Y7 respectively. The outputs of its eight analog switches are connected together to complete the on-state of one of the eight switches. And sends the input signal to the common output.